package com.Z型转换;

public class Solution {
    public String convert(String s, int numRows) {
        char[] c = new char[s.length()];
        int i,index;
        int ci=0;
        if(numRows==1){
            return s;
        }
        for(i=1;i<=numRows;i++){
            index=i-1;
            if(i==1||i==numRows){
                while(index<s.length()&&ci<s.length()){
                	
                    c[ci]=s.charAt(index);
                    ci++;
                    index=index+2*(numRows-1);
                }
            }
            else{
                while(index<s.length()&&ci<s.length()){
                	
                    c[ci]=s.charAt(index);
                    ci++;
                    if(index+2*(numRows-i)<s.length()){
                    
                        c[ci]=s.charAt(index+2*(numRows-i));
                        ci++;
                        index = index+2*(numRows-1);
                    }
                    else {
                    	break;//如果下一个2*(numRows-i)回的数不存在，就结束当前层的统计
                    }
                }
            }
        }
        String S = new String(c);
        return S;
    }
    
    
    

}
